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internal: introduce macro helpers to reject exclusive flags

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Inspired by commit 7e437ee7 that introduced similar macros for virsh
commands so we don't have to repeat the same code all over.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina 2015-03-20 15:38:59 +01:00
parent b978b85b24
commit e86a94ee4c
1 changed files with 50 additions and 0 deletions
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50
src/internal.h
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@ -327,6 +327,56 @@
} \
} while (0)
/* Macros to help dealing with mutually exclusive flags. */
/**
* VIR_EXCLUSIVE_FLAGS_RET:
*
* @FLAG1: First flag to be checked.
* @FLAG2: Second flag to be checked.
* @RET: Return value.
*
* Reject mutually exclusive API flags. The checked flags are compared
* with flags variable.
*
* This helper does an early return and therefore it has to be called
* before anything that would require cleanup.
*/
# define VIR_EXCLUSIVE_FLAGS_RET(FLAG1, FLAG2, RET) \
do { \
if ((flags & FLAG1) && (flags & FLAG2)) { \
virReportInvalidArg(ctl, \
_("Flags '%s' and '%s' are mutually " \
"exclusive"), \
#FLAG1, #FLAG2); \
return RET; \
} \
} while (0)
/**
* VIR_EXCLUSIVE_FLAGS_GOTO:
*
* @FLAG1: First flag to be checked.
* @FLAG2: Second flag to be checked.
* @LABEL: Label to jump to.
*
* Reject mutually exclusive API flags. The checked flags are compared
* with flags variable.
*
* Returns nothing. Jumps to a label if unsupported flags were
* passed to it.
*/
# define VIR_EXCLUSIVE_FLAGS_GOTO(FLAG1, FLAG2, LABEL) \
do { \
if ((flags & FLAG1) && (flags & FLAG2)) { \
virReportInvalidArg(ctl, \
_("Flags '%s' and '%s' are mutually " \
"exclusive"), \
#FLAG1, #FLAG2); \
goto LABEL; \
} \
} while (0)
# define virCheckNonNullArgReturn(argname, retval) \
do { \
if (argname == NULL) { \